<!-- 新增多选页面 -->
<template>
  <div class="multipChoice">
    <el-container>
      <el-container>
        <!-- 左侧 -->
        <el-aside style="width: 50%">
          <el-form
            :model="checkBoxTopicForm"
            ref="checkBoxTopicForm"
            label-width="80px"
          >
            <el-form-item label="题干" prop="name">
              <el-input
                v-model="checkBoxTopicForm.name"
                placeholder="请输入内容"
                label-position="left"
                style="width: 100%"
                suffix-icon="el-icon-plus"
              ></el-input>
            </el-form-item>
            <!-- 选项区域 -->
            <el-form-item label="选项">
              <!-- 默认区域 -->
              <el-form-item
                v-for="(option, index) in checkBoxTopicForm.options"
                :key="option.key"
                :prop="'options.' + index + '.value'"
                style="margin-bottom: 5%"
              >
                <div>
                  <el-tag v-text="option.mappingOption">C</el-tag>
                  <span>&emsp;</span>
                  <el-input
                    v-model="option.value"
                    placeholder="请输入内容"
                    label-position="left"
                    style="width: 85%"
                    suffix-icon="el-icon-plus"
                  ></el-input>
                </div>
              </el-form-item>
              <!-- 动态选项区域 -->
              <el-form-item
                v-for="(option, index) in checkBoxTopicForm.options2"
                :key="option.key"
                :prop="'options2.' + index + '.value'"
                style="margin-bottom: 5%"
              >
                <div>
                  <el-tag v-text="option.mappingOption">E</el-tag>
                  <span>&emsp;</span>
                  <el-input
                    v-model="option.value"
                    placeholder="请输入内容"
                    label-position="left"
                    style="width: 75%"
                    suffix-icon="el-icon-plus"
                  ></el-input>
                  <el-button
                    type="danger"
                    icon="el-icon-close"
                    size="mini"
                    circle
                    @click.prevent="removeOption(option)"
                  ></el-button>
                </div>
              </el-form-item>
            </el-form-item>
            <!-- 标答区域（多选） -->
            <el-form-item label="标答" prop="checkbox">
              <el-checkbox-group v-model="checkBoxTopicForm.checkbox">
                <!-- 默认区域 -->
                <el-checkbox
                  v-for="answer in theAnswer"
                  :label="answer.num"
                  :key="answer.key"
                >
                  <span v-text="answer.tag"></span>
                </el-checkbox>
                <!-- 动态标答区域 -->
                <el-checkbox
                  v-for="answer2 in theAnswer2"
                  :label="answer2.num"
                  :key="answer2.key"
                >
                  <span v-text="answer2.tag"></span>
                  <!-- <el-button type="danger" icon="el-icon-close" size="mini" circle @click.prevent="removeOption(answer2)"></el-button> -->
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
            <!-- 疑惑解析 -->
            <el-form-item label="解析" prop="analysis">
              <el-input
                v-model="checkBoxTopicForm.analysis"
                placeholder="请输入内容"
                label-position="left"
                style="width: 100%"
                suffix-icon="el-icon-plus"
              ></el-input>
            </el-form-item>
            <!-- 分值 -->
            <el-form-item label="分值" prop="num">
              <el-input-number
                v-model="checkBoxTopicForm.num"
                label-position="left"
                controls-position="right"
                style="width: 100%"
                :min="1"
                :max="10"
              ></el-input-number>
            </el-form-item>
            <!-- 难度 -->
            <el-form-item label="难度" prop="difficulty">
              <div class="block" style="padding-top: 2.9%; margin-right: 10%">
                <el-rate v-model="checkBoxTopicForm.difficulty"></el-rate>
              </div>
            </el-form-item>
            <!-- 操作区域 -->
            <el-form-item>
              <el-button type="primary" @click="onSubmit">提交</el-button>
              <el-button @click="onResetFrom('checkBoxTopicForm')"
                >重置</el-button
              >
              <el-button type="primary" @click="onCreateMutipleChoice"
                >添加选项</el-button
              >
            </el-form-item>
          </el-form>
        </el-aside>
        <!-- 右侧 -->
        <el-main style="width: 50%; padding: 0%">
          <el-form
            :model="checkBoxTopicForm"
            ref="checkBoxTopicForm"
            label-width="80px"
          >
            <el-form-item label="题干" prop="name">
              <span
                v-text="checkBoxTopicForm.name"
                label-position="left"
                style="width: 100%"
              ></span>
            </el-form-item>
            <!-- 选项区域 -->
            <el-form-item label="选项">
              <!-- 默认区域 -->
              <el-form-item
                v-for="(option, index) in checkBoxTopicForm.options"
                :key="option.key"
                :prop="'options.' + index + '.value'"
                style="margin-bottom: 5%"
              >
                <div>
                  <span v-text="option.mappingOption">C</span>
                  <span>&emsp;</span>
                  <span
                    v-text="option.value"
                    label-position="left"
                    style="width: 85%"
                  ></span>
                </div>
              </el-form-item>
              <!-- 动态选项区域 -->
              <el-form-item
                v-for="(option, index) in checkBoxTopicForm.options2"
                :key="option.key"
                :prop="'options2.' + index + '.value'"
                style="margin-bottom: 5%"
              >
                <div>
                  <span v-text="option.mappingOption">E</span>
                  <span>&emsp;</span>
                  <span
                    v-text="option.value"
                    placeholder="请输入内容"
                    label-position="left"
                    style="width: 75%"
                  ></span>
                </div>
              </el-form-item>
            </el-form-item>
            <!-- 标答区域 -->
            <el-form-item label="标答" prop="checkbox">
              <el-checkbox-group v-model="checkBoxTopicForm.checkbox">
                <!-- 默认区域 -->
                <el-checkbox
                  v-for="answer in theAnswer"
                  :label="answer.num"
                  :key="answer.key"
                  disabled
                >
                  <span v-text="answer.tag"></span>
                </el-checkbox>
                <!-- 动态标答区域 -->
                <el-checkbox
                  v-for="answer2 in theAnswer2"
                  :label="answer2.num"
                  :key="answer2.key"
                  disabled
                >
                  <span v-text="answer2.tag"></span>
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
            <!-- 疑惑解析 -->
            <el-form-item label="解析" prop="analysis">
              <span
                v-text="checkBoxTopicForm.analysis"
                placeholder="请输入内容"
                label-position="left"
                style="width: 100%"
                suffix-icon="el-icon-plus"
              ></span>
            </el-form-item>
            <!-- 分值 -->
            <el-form-item label="分值" prop="num">
              <span
                v-text="checkBoxTopicForm.num"
                label-position="left"
                controls-position="right"
                style="width: 100%"
                :min="1"
                :max="10"
              ></span>
            </el-form-item>
            <!-- 难度 -->
            <el-form-item label="难度" prop="difficulty">
              <div class="block" style="padding-top: 2.9%; margin-right: 10%">
                <el-rate
                  v-model="checkBoxTopicForm.difficulty"
                  disabled
                ></el-rate>
              </div>
            </el-form-item>
          </el-form>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 表单数据
      checkBoxTopicForm: {
        // 题干
        name: "",
        // 默认选项区域
        options: [
          {
            mappingOption: "A",
            value: "",
          },
          {
            mappingOption: "B",
            value: "",
          },
          {
            mappingOption: "C",
            value: "",
          },
          {
            mappingOption: "D",
            value: "",
          },
        ],
        // 动态选项
        options2: [],
        // 标答
        checkbox: ["选中", 1],
        // 解析
        analysis: "",
        // 分值
        num: 1,
        // 难度
        difficulty: 1,
      },
      // 动态新增选项区域标签
      addOptions2: {
        letters: ["E", "F", "G", "H"],
        // 记录当前选项标签索引
        addNum: 0,
        // 标答值
        saveNum: [4, 5, 6, 7],
        // 标答标签索引
        addSaveNum: 0,
      },
      // 默认标答区域
      theAnswer: [
        {
          tag: "A",
          num: 0,
        },
        {
          tag: "B",
          num: 1,
        },
        {
          tag: "C",
          num: 2,
        },
        {
          tag: "D",
          num: 3,
        },
      ],
      // 动态标答区域
      theAnswer2: [],
    };
  },
  methods: {
    //   提交表单
    onSubmit() {
      // 将表单数据转化为JSON格式
      var json = JSON.stringify(this.checkBoxTopicForm);
      alert(json);
    },
    // 新增单选列和标答
    onCreateMutipleChoice() {
      // 初始长度默认4
      var length = this.checkBoxTopicForm.options.length;
      // 动态的选项长度
      var length2 = this.checkBoxTopicForm.options2.length + 1;
      length2 = length2 + length;
      if (length2 > 6) {
        this.$message({
          showClose: true,
          message: "最多支持6个选项哦！",
          type: "warning",
        });
        return;
      }
      // 新增选项区域
      this.checkBoxTopicForm.options2.push({
        mappingOption: this.addOptions2.letters[this.addOptions2.addNum],
        value: "",
        key: Date.now(),
      });
      this.addOptions2.addNum++;
      // 新增标答区域
      this.theAnswer2.push({
        tag: this.addOptions2.letters[this.addOptions2.addSaveNum],
        num: this.addOptions2.saveNum[this.addOptions2.addSaveNum],
        key: Date.now(),
      });
      this.addOptions2.addSaveNum++;
    },
    // 重置表单数据
    onResetFrom(formName) {
      // 重置必须使用prop标签否则无效
      this.$refs[formName].resetFields();
      // 重置data中的某个Form表单
      // console.log(formName);
      // this.checkBoxTopicForm = this.$options.data().checkBoxTopicForm;
    },
    // 删除选项
    removeOption(item) {
      // 删除选项
      var index = this.checkBoxTopicForm.options2.indexOf(item);
      if (index !== -1) {
        this.checkBoxTopicForm.options2.splice(index, 1);
        this.addOptions2.addNum--;
        //   对动态选项区域数组进行标签顺序排列
        const length = this.addOptions2.addNum;
        for (var i = 0; i < length; i++) {
          (this.checkBoxTopicForm.options2[i].mappingOption =
            this.addOptions2.letters[i]),
            (this.checkBoxTopicForm.options2[i].value =
              this.checkBoxTopicForm.options2[i].value);
        }
        // 删除动态标答区域
        this.theAnswer2.splice(index, 1);
        this.addOptions2.addSaveNum--;
        //   对动态标答区域数组进行标签顺序排列
        const length2 = this.addOptions2.addSaveNum;
        for (var i2 = 0; i2 < length2; i2++) {
          (this.theAnswer2[i2].tag = this.addOptions2.letters[i2]),
            (this.theAnswer2[i2].num = this.theAnswer2[i2].num);
        }
      }
    },
  },
};
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.s {
  margin-bottom: 5%;
  margin: 0%;
}
</style>
